I've used a piece of brass brazing rod, ~ 3/16" diameter, to drive them out from front to back. First apply some light weight oil on the full length of the hinge and let it soak in. Using the brass rod, and medium size hammer, tap on the rod until it comes a few inches out the back of hinge. Then chuck a 3/4" variable speed reversing drill on the exposed part of the hinge rod and slowly turn the rod ccw and pull out on it at the same time. If it should stop coming out, reverse the drill and turn the rod in a cw direction as you continue pulling out on the rod. Repeat procedure until rod is completely out of the hinge.
I was a bit slow posting this...I started before David and Lawrie had made their posts, but they finished and posted theirs before I could